Berenstain Bears and the Spooky Old Tree, The (GBA)
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Unlock level 2
Enter the following password at the password screen, its located in the second option at the main menu: Bug Squirrel Knight Knight
Unlock level 3
Enter the following password at the password screen, its located in the second option at the main menu: Squirrel Bug Knight Drawers
Unlock level 4
Enter the following password at the password screen, its located in the second option at the main menu: Drawers Drawers Knight Drawers
Unlock level 5
Enter the following password at the password screen, its located in the second option at the main menu: Knight Squirrel Squirrel Knight
Unlock level 6
Enter the following password at the password screen, its located in the second option at the main menu: Bug Squirrel Bug Bug
Unlock level 7
Enter the following password at the password screen, its located in the second option at the main menu: Squirrel Bug Knight Bug